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Finding the Fourth Proportional to 308,635.37, 425,933.35 and 172,661.20

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Solution

The fourth proportional to 308,635.37, 425,933.35 and 172,661.20 is: 238,281.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,635.37 : 425,933.35 = 172,661.20 : x
  2. Step 2: Convert to fraction form
    308,635.37/425,933.35 = 172,661.20/x
  3. Step 3: Cross multiply
    308,635.37x = 425,933.35 × 172,661.20
  4. Step 4: Simplify right side
    308,635.37x = 73,542,163,331.02
  5. Step 5: Solve for x
    x = 73,542,163,331.02/308,635.37
  6. Step 6: Final answer
    x = 238,281.71

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.